WBCS.LIVE practice question

Under normal physiological conditions at rest, what is the exact maximum amount of oxygen (O2) carried by 100 ml of pure, oxygenated human blood?

Solve this multiple-choice question and check the correct answer with its explanation below.

Answer options

  1. 5 ml
  2. 10 ml
  3. 20 ml
  4. 30 ml

Correct answer and explanation

Correct answer: 20 ml

Explanation: āœ… Correct Answer: C) 20 ml šŸ“š Explanation: The primary oxygen-carrying molecule in human blood is hemoglobin, heavily packed inside red blood cells. Under normal, healthy physiological conditions, 1 gram of fully saturated hemoglobin can bind to approximately 1.34 ml of oxygen. Consequently, 100 ml of healthy, fully oxygenated arterial blood consistently carries about 20 ml of dissolved oxygen.